Well, instead of hopelessly tweaking curation, why don't we tackle voteselling head on? Hain't heard no one taking that on since @ned spoke in Korea, and that's the actual problem.
If I got a broke leg, don't paint my toenails. Set my damn leg. The problem is profiteering, and curation rewards only add to the extractive produce of that, at least by lowering the cost of buying votes. @ned attested to the potential of oracles to eliminate that problem.
What are some other potential solutions?